SQM50.480R8Z3 Siemens Damper Motor

Overview

The Siemens SQM50.480R8Z3 is a high-precision electromotive reversing actuator designed to drive gas or air dampers, flow control valves, and butterfly valves in medium to large capacity oil and gas burners. Engineered for industrial and commercial burner applications, this actuator provides reliable rotary motion and advanced modulation capabilities. It is specifically designed to work with electronic modules for precise position feedback and control, ensuring high accuracy and repeatability in building automation and combustion systems.

Features

• Electromotive reversing actuator with 90 degree angular rotation
• Integrated electronic module for versatile control input and position feedback signals
• Includes 8 internal switches consisting of 2 limit switches and 6 auxiliary switches
• Designed for counterclockwise rotation when facing the drive shaft
• Housing constructed from durable die-cast aluminum with impact-proof plastic covers
• Gear train and cam shaft can be disengaged separately for easier adjustment
• Internal and external position indication for clear monitoring during operation
• Maintenance-free gear train and reversible synchronous motor

Specifications

• Model: SQM50.480R8Z3
• Operating Voltage: AC 24 V (50/60 Hz)
• Torque: 140 lb-in (approx. 15 Nm)
• Running Time: 25 seconds at 60 Hz (30 seconds at 50 Hz) for 90 degrees
• Number of Switches: 8 (2 limit, 6 auxiliary)
• Shaft Design: None (shaft must be ordered separately)
• Rotational Direction: Counterclockwise
• Operating Temperature: -4 F to 140 F (-20 C to 60 C)
• Protection Rating: Designed for IP54 (with appropriate cable glands)
• Agency Approvals: UL recognized, CSA certified, and CE approved

Applications

• Load-dependent control of gas, oil, and combustion air in burner systems
• Positioning of air dampers in comfort ventilation and HVAC systems
• Control of flow control valves and butterfly valves (e.g., Siemens VKF41 series)
• Integration with 3-position or modulating controllers (e.g., 4 to 20 mA or 0 to 10 VDC)
• Industrial and commercial burner applications requiring high modulating accuracy